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This work aims at studying the combined effect of oxygen enrichment and emulsification techniques on engine performance behavior of a compression ignition engine fuelled with WCO (waste cooking oil) as fuel. Used sunflower oil collected from a restaurant was chosen as fuel. A single cylinder, water cooled, agricultural oriented, diesel engine was used for the experiments. Initially tests were performed using neat diesel and neat WCO as fuels. Performance, emission, and combustion parameters were obtained. In the second phase of work, WCO was converted into its emulsion by emulsification process using water and ethanol and tested. In the third phase, the engine intake system was modified to admit excess oxygen along with air to test the engine with WCO and WCO emulsion as fuels under oxygen enriched environment. A comparative study was made at 100% and 40% of the maximum load (i.e. 3.7 kW power output) at the rated engine speed of 1500 rpm.

This paper aims at studying the effect of oxygen enriched combustion on performance, emission and combustion characteristics of a diesel engine using the blend of Pyro oil obtained from pyrolysis of cashew nut shell and conventional diesel as fuel. A single cylinder water-cooled, diesel engine was used. The intake system of the engine was modified to accommodate excess oxygen in the incoming air. A separate oxygen cylinder was used for storing pure oxygen and supplying it along with intake air. Base line data was generated using diesel as fuel. Subsequently experiments were repeated with the blend of 40% of Cashew nut shell oil and 60% diesel by volume (called CSO40D60) at different oxygen concentrations such as 21%, 22% 23%, 24% and 25%. Engine performance, emission and combustion parameters were obtained at different power outputs and analyzed.